Loving the game so far, maybe a lategame button that gives you a second field so you can have 2 playing fields. So we can try out new cooling systems as well as potentially double our power production. this might do things to balancing, so maybe have like several fields available and you can unlock a second field relatively early, and 3+ fields late late game
 "Idle Pins"){kind=icon}
 "Reactor Incremental"){kind=icon}